This tool is intended to augment human work on a script. That is, tool will help generate script code for endless DS (dcl-ds) structures. This tool will not do all your work. You need review generated code, possibly adjust tool output where too complex. However, much of RPG structures (Cobol) is fairly typical record(ish), aka, simple. I use mapping tool to initial generate code to avoid typing same sort of toolkit code over (and over).
BTW -- (*) not expert in Cobol (help wanted).
On-line tool (running version)
Possible tool will be expanded beyond php to generate toolkit calls for other language (python, node, etc.).
Possible expanded to work with new db2sock project JSON only toolkit (when ready).